冒充 pretend to be; pass sb. or sth. off as 次品冒充正品 pass shoddy products off as ones of high quality; 冒充内行 pretend to be an expert; pose as an expert; 他起初冒充正人君子, 可是无法继续维持那个假象。 he was unable to maintain the image of the perfect gentleman for which he had succeeded in passing at first.; 冒充者 jactitator; fraud; fake